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quartz-font: Add truetype font table tags accessor

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Improves the quality of embedded fonts.
This commit is contained in:
Andrea Canciani 2010-11-01 14:06:32 +01:00
parent bb30dae210
commit 947d35c195
1 changed files with 38 additions and 1 deletions
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39
src/cairo-quartz-font.c
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@ -61,6 +61,8 @@
* This macro can be used to conditionally compile backend-specific code.
*/
static CFDataRef (*CGFontCopyTableForTagPtr) (CGFontRef font, uint32_t tag) = NULL;
/* CreateWithFontName exists in 10.5, but not in 10.4; CreateWithName isn't public in 10.4 */
static CGFontRef (*CGFontCreateWithFontNamePtr) (CFStringRef) = NULL;
static CGFontRef (*CGFontCreateWithNamePtr) (const char *) = NULL;
@ -99,6 +101,8 @@ quartz_font_ensure_symbols(void)
if (_cairo_quartz_font_symbol_lookup_done)
return;
CGFontCopyTableForTagPtr = dlsym(RTLD_DEFAULT, "CGFontCopyTableForTag");
/* Look for the 10.5 versions first */
CGFontGetGlyphBBoxesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphBBoxes");
if (!CGFontGetGlyphBBoxesPtr)
@ -754,6 +758,39 @@ _cairo_quartz_ucs4_to_index (void *abstract_font,
return glyph;
}
static cairo_int_status_t
_cairo_quartz_load_truetype_table (void *abstract_font,
unsigned long tag,
long offset,
unsigned char *buffer,
unsigned long *length)
{
cairo_quartz_font_face_t *font_face = _cairo_quartz_scaled_to_face (abstract_font);
CFDataRef data = NULL;
CFIndex len;
if (likely (CGFontCopyTableForTagPtr))
data = CGFontCopyTableForTagPtr (font_face->cgFont, tag);
if (!data)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (length) {
if (*length == 0) {
*length = CFDataGetLength (data);
return CAIRO_STATUS_SUCCESS;
}
len = *length;
} else
len = CFDataGetLength (data);
if (buffer)
CFDataGetBytes (data, CFRangeMake (offset, len), buffer);
return CAIRO_STATUS_SUCCESS;
}
static const cairo_scaled_font_backend_t _cairo_quartz_scaled_font_backend = {
CAIRO_FONT_TYPE_QUARTZ,
_cairo_quartz_scaled_font_fini,
@ -761,7 +798,7 @@ static const cairo_scaled_font_backend_t _cairo_quartz_scaled_font_backend = {
NULL, /* text_to_glyphs */
_cairo_quartz_ucs4_to_index,
NULL, /* show_glyphs */
NULL, /* load_truetype_table */
_cairo_quartz_load_truetype_table,
NULL, /* map_glyphs_to_unicode */
};